Winstrol and Drugtesting

A girlfriend of mine is participating in a fitness contest, and she wants to use either prim tabs or winnys to pack some muscle. My question is as follows: For how long after the use of these roids will she fail a drug test, or rather how long before the contest should she stop using?

She also want to use some clenbutorol, for how long before the show should she stop using that?
I would be very thankfull for an answer.
Best regards!

Winny tabs I believe clear around three weeks. Primo is 5 weeks. The clearance times may vary depending on body fat H20 intake etc.